Finding reverse sat current of pn junction diode

[ralph13]

Homework Statement

Determine reverse sat current of diode. To show and explain approach. Given-IV characteristics of diode and tabulated values for forward bias voltage from 0-0.8v and corresponding current values.

Homework Equations

At which point do I need to consider to find the reverse sat current

The Attempt at a Solution

using formula of ideal diode current densityfor an abrupt pn junction diode??

 

[noumed]

it's been a while since I've done diode problems... but from the IV characteristics graph, can't you determine the reverse sat current from the graph? not sure if forward bias voltages help, because you need the diode to be reverse biased (V < 0V) to see reverse sat current... did that help? or maybe I'm just not understanding your question..

 

[Redbelly98]

Welcome to PF, ralph13.

If you are only given or shown the i-v for positive values, between 0 and 0.8V, that rules out a direct observation.

Do you have a general equation for a diode's i-v characteristic?